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Characterization of 3D thermal neutron semiconductor detectors
Czech Technical University in Prague, Czech Republic.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media. (Electronics design division, STC)ORCID iD: 0000-0002-8325-5177
Czech Technical University in Prague, Czech Republic.
Stanford University, United States.
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2007 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 576, no 1, 32-37 p.Article in journal (Refereed) Published
Abstract [en]

Neutron semiconductor detectors for neutron counting and neutron radiography have an increasing importance. Simple silicon neutron detectors are combination of a planar diode with a layer of an appropriate neutron converter such as (LiF)-Li-6. These devices have limited detection efficiency of not more than 5%. The detection efficiency can be increased by creating a 3D microstructure of dips, trenches or pores in the detector and filling it with a neutron converter. The first results related to the development of such devices are presented. Silicon detectors were fabricated with pyramidal dips on the surface covered with (LiF)-Li-6 and then irradiated by thermal neutrons. Pulse height spectra of the energy deposited in the sensitive volume were compared with simulations. The detection efficiency of these devices was about 6.3%. Samples with different column sizes were fabricated to study the electrical properties of 3D structures. Charge collection efficiencies in silicon columns from 10 to 800 mu m wide and 80-200 mu m high were measured with alpha particles.

The neutron detection efficiency of a full 3D structure was simulated. The results indicate an increase in detection efficiency by a factor of 6 in comparison with a standard planar neutron detector.

Place, publisher, year, edition, pages
2007. Vol. 576, no 1, 32-37 p.
Keyword [en]
3D detectors, Neutron detectors, Neutron imaging, Pixel detectors, Radiography
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-3910DOI: 10.1016/j.nima.2007.01.115ISI: 000247330000009Scopus ID: 2-s2.0-34248208179Local ID: 4278OAI: oai:DiVA.org:miun-3910DiVA: diva2:28942
Conference
8th International Workshop on Radiation Imaging Detectors, Jul 02-06, 2006, pisa, Italy
Projects
STC - Sensible Things that Communicate
Note

8th International Workshop on Radiation Imaging Detectors, Jul 02-06, 2006, Pisa, Italy

Available from: 2008-12-11 Created: 2008-12-11 Last updated: 2016-10-05Bibliographically approved

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Fröjdh, ChristerPetersson, StureThungström, Göran
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Electrical Engineering, Electronic Engineering, Information Engineering

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CiteExportLink to record
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Citation style
  • apa
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More styles
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